| 中国东海近海岛屿冬季与夏季气溶胶中水溶性离子化学组分特征及来源解析 |
| 摘要点击 1794 全文点击 863 投稿时间：2019-09-09 修订日期：2019-11-02 |
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| 中文关键词 东海 背景站 总悬浮颗粒(TSP) 水溶性离子 非海洋硫酸盐 |
| 英文关键词 East China Sea background aerosol site total suspended particulate (TSP) water-soluble ions non-sea-salt sulfates |
| 作者 | 单位 | E-mail | | 方言 | 南京信息工程大应用气象学院, 气候与环境变化国际合作联合实验室大气环境中心, 南京 210044
南京信息工程大学气象灾害预报预警与评估协同创新中心, 气象灾害教育部重点实验室, 南京 210044 | 20171203255@nuist.edu.cn | | 曹芳 | 南京信息工程大应用气象学院, 气候与环境变化国际合作联合实验室大气环境中心, 南京 210044
南京信息工程大学气象灾害预报预警与评估协同创新中心, 气象灾害教育部重点实验室, 南京 210044 | caofangle@163.com | | 范美益 | 南京信息工程大应用气象学院, 气候与环境变化国际合作联合实验室大气环境中心, 南京 210044
南京信息工程大学气象灾害预报预警与评估协同创新中心, 气象灾害教育部重点实验室, 南京 210044 | | | 章炎麟 | 南京信息工程大应用气象学院, 气候与环境变化国际合作联合实验室大气环境中心, 南京 210044
南京信息工程大学气象灾害预报预警与评估协同创新中心, 气象灾害教育部重点实验室, 南京 210044 | |
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| 中文摘要 |
| 本研究于2017年12月至2018年2月以及2018年6~8月在嵊泗岛屿共采集70个大气总悬浮颗粒（TSP）样品，利用离子色谱法分析TSP样品中水溶性离子（主要包括：Na+、K+、NH4+、Mg2+、Ca2+、Cl-、SO42-、NO3-和MSA）的质量浓度，结合HYSPLIT后向轨迹模型，离子相关性分析和主成分分析等方法，探讨东海背景站水溶性离子组分的化学特征、季节差异以及主要来源.结果显示，观测期间TSP和主要水溶性无机离子（WSIIs）质量浓度均表现为冬季高、夏季低，冬季和夏季的总水溶性离子（TWSIIs）平均质量浓度分别为（26.5±16.3）μg·m-3和（8.8±3.8）μg·m-3.二次离子（NO3-、SO42-与NH4+）是TSP中最主要的离子组分，在冬、夏两季分别占TWSIIs的86.2%和74.9%.非海盐硫酸盐（nss-SO42-）主要来自人为排放，夏季生源硫酸盐对nss-SO42-的贡献为28.1%，冬季贡献率为5.9%.另外，研究站点受季节气温变化、长距离传输以及夏季生物源的影响，导致冬季NO3-质量浓度最高，夏季SO42-质量浓度最高.主成分分析（PCA）结果表明，东海地区气溶胶化学组分在夏季主要受到海洋源的影响较大，冬季则主要受到人为排放源的输入影响.冬季Cl-由于受到人类活动影响出现了一定程度的氯富集，富集因子的平均值为38.5%. |
| 英文摘要 |
| A total of 70 total suspended particulate (TSP) samples were collected from December 2017 to February 2018 and June to August 2018 in Shengsi Islet, East China Sea. In this study, the mass concentrations of water-soluble ions in the TSP (including Na+, K+, NH4+, Mg2+, Ca2+, Cl-, SO42-, NO3-, and MSA) samplers were determined by ion chromatography. The chemical characteristics, seasonal differences, and main sources of water-soluble ions in this background aerosol site were investigated by a multiple-technique analysis combining a HYSPLIT model, correlation analysis of water-soluble ions, and primary component analysis. The results showed that the average mass concentrations of TSP and the main water-soluble inorganic ions (WSIIs) were both high in winter and low in summer; the average mass concentration of total WSIIs in winter was (26.5±16.3) μg·m-3, and in summer was (8.8±3.8) μg·m-3. Secondary inorganic ions (NO3-, SO42-, and NH4+) are the most important ionic components in TSP, which accounted for 86.2% and 74.9% of TWSIIs in winter and summer, respectively. Meanwhile, the study site was affected by seasonal temperature change, long-distance transmission, and summer biogenic sulfates. The mass concentration of nitrate was highest in winter, and the mass concentration of sulfate was highest in summer. Anthropogenic sources were the main source of nss-SO42- in atmospheric aerosols. The analysis of sulfate sources showed that contributions of biogenic sulfates to nss-SO42- were 28.1% and 5.9% in summer and winter, respectively. The results of principal component analysis indicated that the main sources of aerosol chemical composition were marine and anthropogenic sources in summer and winter, respectively. In winter, Cl- showed a certain degree of enrichment due to the influence of human activities, and the average value of the enrichment factor was 38.5%. |
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